[OASIS Issue Tracker] Commented: (TOSCA-42) Modeled entity instance requirements

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    [ http://tools.oasis-open.org/issues/browse/TOSCA-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=30847#action_30847 ] 

Derek Palma commented on TOSCA-42:
----------------------------------

This kind of requirement can be addressed by using the Requirements/Capabilities mechanism being proposed to resolve TOSCA-26.


> Modeled entity instance requirements
> ------------------------------------
>
>                 Key: TOSCA-42
>                 URL: http://tools.oasis-open.org/issues/browse/TOSCA-42
>             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
>          Issue Type: Sub-task
>          Components: Spec
>            Reporter: Derek Palma
>
> Modeled entity instance requirements. A model entity instance (Node/Relationship Template) may represent an entity which has a dependency on its own realization (i.e. the version of the deployment artifacts used to materialize it at deployment time)  and/or the existence of components with specific versions on which it depends. For example, SugarCRM may need to be deployed into a specific version of Apache web server along with version 5.3 of the PHP Runtime. Such dependency semantics are used by most modern language library managers (perl, ruby, ...) , package mangers (RPM, Deb, MSI, ...), and component containers (OSGI, PHP, process engines, ...).

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